In a word, no.
Two machines cannot work on one task, other than in some very specialized rendering, modelling or digial audio systems where distributed processing nhas been specially programmed in.
What you can do is run two machines, each on different software, and switch back and forth between them with a KVM switch so that while one is doing, say, an iMovie render or a database import, you can check email and post on MR with the other one.